Three series of novel polyurethane elastomers containing phenolphthalein as chain extenders were synthesized. The structure of the polyurethane was analyzed using IR and wide-angle X-ray diffraction studies. Tensile strength and percentage of elongation of all the series of polymers were studied. Th
The properties of polyurethanes with mixed chain extenders and mixed soft segments
β Scribed by Tae Oan Ahn; Soon-Uk Jung; Han Mo Jeong; Sang Won Lee
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 535 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0021-8995
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The molecular mobility and hydration properties of model segmented polyurethanes from either poly(propylene glycol) (PPG) or poly(butylene adipate) (PBAD), both of molecular weight 2000 (soft segments), and three different diisocyanates (all-trans 4,4Πdicyclohexylmethane diisocyanate, 100% t,t HMDI;
Thermoplastic polyurethane elastomers were prepared from 4,4-diphenylmethane diisocyanate (MDI)/1,4-butanediol (BD)/poly(propylene glycol) (PPG) and MDI/BD/poly(oxytetramethylene glycol) (PTMG). The MDI/BD-based hard-segment content of polyurethane prepared in this study was of 39 -65 wt %. These po